2015 AUDI S4 Complaints

View complaints related to 2015 AUDI S4. The complaints found here are submitted by actual consumers with first hand experience. There are more than 10 complaints submitted for the 2015 AUDI S4. You can submit your own complaint to the NHTSA or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153.

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  • 2015 AUDI S4
    - Inver Grove Heights, MN

    The R&R valve/oil separator unit failed on my 2015 Audi S4 at approximately 71,000 miles. This unit, when fails, can mix the oil and anti-freeze which can seize the engine. I was able to catch the problem before engine failure. Minneapolis Audi repaired the vehicle this week, 1/10/23. There were NO warning indicators except noise. Various media sources have stated that this is a known engine failure concern between 60-90K miles for this engine. Audi does not recognize this as a safety or warranty concern.

    Source: NHTSA WEB SITE